EP0155766B1 - Verfahren und Vorrichtung zum Kleben von Wellpappe - Google Patents

Verfahren und Vorrichtung zum Kleben von Wellpappe Download PDF

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Publication number
EP0155766B1
EP0155766B1 EP85301095A EP85301095A EP0155766B1 EP 0155766 B1 EP0155766 B1 EP 0155766B1 EP 85301095 A EP85301095 A EP 85301095A EP 85301095 A EP85301095 A EP 85301095A EP 0155766 B1 EP0155766 B1 EP 0155766B1
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EP
European Patent Office
Prior art keywords
glue
heat
core sheet
starch
liner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85301095A
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English (en)
French (fr)
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EP0155766A1 (de
EP0155766B2 (de
Inventor
Kazuo C/O Mori Shigyo Co. Ltd. Mori
Eiichi C/O Isowa Industry Co. Ltd. Isowa
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Isowa Industry Co Ltd
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Isowa Industry Co Ltd
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Application filed by Isowa Industry Co Ltd filed Critical Isowa Industry Co Ltd
Publication of EP0155766A1 publication Critical patent/EP0155766A1/de
Publication of EP0155766B1 publication Critical patent/EP0155766B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2818—Glue application specially adapted therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1016—Transverse corrugating
    • Y10T156/1021—Treating material of corrugated lamina or dry adhesive thereon to render tacky
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
    • Y10T156/1724—At spaced areas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
    • Y10T156/1727—Plural indefinite length or running length workpieces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
    • Y10T156/1727—Plural indefinite length or running length workpieces
    • Y10T156/1732—Fluid applied to plural workpieces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1798—Surface bonding means and/or assemblymeans with work feeding or handling means with liquid adhesive or adhesive activator applying means

Definitions

  • This invention relates to a method and apparatus for glueing corrugated board, and more particularly to a method and apparatus for preheating starch glue to a predetermined temperature range prior to bonding a liner sheet to a corrugated core sheet in the production of single- or double-faced corrugated board or double-faced dual corrugated board, for the purpose of shortening the time which is required for heating the glue up 'to its gelling temperature, thereby improving the efficiency of corrugated board production and facilitating the gelation adhesion and heating equipment.
  • the corrugator machines intended for single-faced corrugated board or double-faced dual corrugated board generally employs a starch glue for a glue applicator which applies the glue on ridges of flutes of a corrugated core sheet to which a liner or facing sheet is to be bonded.
  • starch glue is normally in the form of a suspension of low viscosity which is (in the case of the Stein Hall method) composed of a mixture pf a main part containing starch and water in appropriate proportions and a carrier part containing starch and caustic soda in suitable proportions.
  • the starch glue is stored in a glue pan which constitutes part of the glue applicator, and applied in a suitable amount of the ridge portions of a corrugated core paper by means of an applicator roll.
  • the corrugated sheet with the starch glue applied on the ridge portions of its flutes is bonded to a liner and then fed into a predetermined heating zone in which the applied glue is heated to a gelling temperature to develop its strong adhesive force.
  • the gelling temperature of the starch glue is about 60°C (through varies depending upon its composition), but the starch in the glue pan is maintained approximately at ambient temperature so that it needs to be heated up to its gelling temperature by the use of a heater in order to develop its inherent adhesive force to guarantee strong bond of the liner to the corrugated sheet.
  • a heater it is often the case that such a heater is extremely lengthy and has a drawback that it occupies a large space of a corrugator line.
  • Fig. 1 schematically shows glue applicators and a double backer mechanism for producing double-faced dual corrugated board.
  • the back liner of the single-faced corrugated board 12 and a liner 24 which is fed through another preheater 22 are bonded to the ridges of corrugations of the single-faced corrugated board 10 and 12, respectively, between guide rolls 26 which are located downstream of the glue applicators.
  • Each one of the glue applicators 18 and 20 is provided with an applicator roll 28 and a doctor roll 30 in the usual manner, applying the starch glue 34 in the glue pan 32 to the ridges of the single-faced corrugated board through the applicator roll 28.
  • the starch glue 34 in the glue pan 32 is approximately at the ambient temperature, so that it has to be heated to the gelling temperature to produce its adhesive force.
  • the heating boxes 36 are constituted by a hollow box of iron casting with thick walls, and heated by internally flowing steam to transmit heat to glued portions of a double-faced dual corrugated board which is passed along the surfaces of the heat boxes, thereby attaining adhesion through gelation of the glue which is applied on the ridge portions of corrugated core paper.
  • the corrugator lines are operated at high speeds, passing corrugated board at a high speed through a heating zone which is constituted by the heat boxes 36.
  • the provision of a lengthy heating zone has been unavoidably required to comply with the demand for speed-up of operation.
  • U.S. Patent Specification No. 4,268,341 describes a method for glueing corrugated board having the features of the preamble of Claim 1 and an apparatus having the features of the preamble of Claim 3.
  • the present inventor has conducted an extensive study and as a result found that it becomes possible to shorten to a considerable degree the heating time which is required for gelation of the starch glue after bonding a corrugated sheet and a liner together and at the same time to reduce the installation space of a heater, by preheating the starch glue in the glue applicator (more precisely the starch glue which is circulated between the glue applicator and a stock tank) to a predetermined temperature range.
  • a method for glueing corrugated board which method is characterized by heating a starch glue up to a predetermined temperature range by heat exchange; supplying the starch glue to a glue pan which is placed in a hot atmosphere in a heat-insulated space to maintain the glue in heated state; feeding a corrugated core sheet and a liner into the heat-insulated space; applying the heated starch glue on ridge portions of the corrugated core sheet; and bonding the corrugated core sheet and liner together.
  • a method for glueing corrugated board which method is characterized by heating a starch glue up to a predetermined temperature range by heat exchange; supplying the starch glue to a glue pan which is placed in a hot atmosphere in a heat-insulated space to maintain the glue in heated state; feeding a corrugated core sheet and a liner into the heat-insulated space; applying the heated starch glue on ridge portions of the corrugated core sheet; and quickly heating the starch glue on the ridge portions of the corrugated core sheet by blasting hot saturated steam thereagainst immediately before bonding together the corrugated core sheet and liner.
  • an apparatus for carrying out the above-described method namely, an apparatus for glueing corrugated board, including a preheating mechanism for preliminarily heating a corrugated core sheet and a liner to be bonded together, and a glue applicator for applying a starch glue in a glue pan on ridge portions of the preheated corrugated core sheet by means of an applicator roll, characterized in that the apparatus comprises in combination: a glue heater communicating with the glue pan and adapted to heat a starch glue from a stock tank up to a predetermined temperature range; and a casing forming a substantially closed, heat-insulated space around the preheating mechanism and glue applicator.
  • the corrugated board glueing apparatus is characterized by the provision of a glue heater communicating with the glue pan and adapted to heat a starch glue from a stock tank up to a predetermined temperature range; a casing forming a substantially closed, heat-insulated space around the preheating mechanism and glue applicator, and a saturated steam blow pipe located immediately upstream of a position where the corrugated core sheet and liner are bonded together and having a multitude of steam blow holes each directed to the ridge portions of the corrugated core sheet.
  • FIG. 2 there is schematically shown a corrugated board glueing machine embodying the invention, which is suitable for use as a glue machine in the production of double-faced dual corrugated board as shown in Fig. 1 and also as a glue machine in the production of single-faced corrugated board by a single facer or in the production of double-faced corrugated board.
  • a corrugated board glueing machine embodying the invention which is suitable for use as a glue machine in the production of double-faced dual corrugated board as shown in Fig. 1 and also as a glue machine in the production of single-faced corrugated board by a single facer or in the production of double-faced corrugated board.
  • those parts which are common to Fig. 1 are designated by the same reference numerals for the sake of convenience.
  • a preheating mechanism including the afore-mentioned preheaters and a glueing mechanism 18 are housed in a substantially closed heat-insulating casing 42 in the manner as will be described in detail hereinlater.
  • a glue pan 32 of the glue applicator 18 is communicated with a glue heater 44 which serves to heat up a starch glueto a predetermined temperature range (as will be exemplified hereinlater), through a glue feed pipe 46 and a glue return pipe 48.
  • the glue heater 44 is communicated with a tank 50 which holds a stock of the starch glue and which supplies the glue to the heater 44, through a subtank 52 in the particular embodiment shown, which is interposed between the stock tank 50 and heater 44 for operation as follows.
  • the stock tank 50 holds a stock of the starch glue consisting of main and carrier parts containing starch, water and caustic soda in appropriate proportions as mentioned hereinbefore.
  • the glue stock is stirred and constantly maintained in uniform concentration by an agitator 54 which is provided in the stock tank 50.
  • a pipe 56 which is extended out from the bottom of the stock tank 50 is communicated with an inner tank 58 of the subtank 52.
  • the pipe 56 is also connected to a plural number of similar subtanks 56 although not shown.
  • the subtank 52 has a double-tank construction consisting of an outer tank 60 and an inner tank 58 which is located in the outer tank 60 at a predetermined distance therefrom.
  • the outer tank 60 holds a liquid heat medium such as water 62 to a predetermined level.
  • a steam feed pipe 64 which is in communication with a steam source, not shown, is connected to the bottom of the outer tank 60 to blow saturated steam into water 62 for raising the water temperature to a level of, for example, 47°C.
  • the inner tank 58 receives the starch glue 34 from the stock tank 50 and holds it to a predetermined level, uniformly stirring the glue by an agitator 66.
  • the starch glue 34 in the inner tank 58 is maintained at a temperature of 38°C to 40°C through heat exchange with heated water in the outer tank 60.
  • the warmed glue 34 is supplied to the heater 44 which will be described hereinlater, through a pipe 68 which is connected to the bottom of the inner tank 58.
  • the heater 44 is constituted by a cylindrical tank of a predetermined diameter which basically includes a pooling chamber 70 which receives the supply of the starch glue 34 from the subtank 52 (or from the stock tank 50 in a case where the subtank is omitted), a multitude of heat exchange pipes 72 which are connected to the pooling chamber 70 to permit passage therethrough of the starch glue 34, and a heat medium chamber 74 which circumvents the heat exchange pipes 72 through a heat medium such as water.
  • a pooling chamber 70 which receives the supply of the starch glue 34 from the subtank 52 (or from the stock tank 50 in a case where the subtank is omitted)
  • a multitude of heat exchange pipes 72 which are connected to the pooling chamber 70 to permit passage therethrough of the starch glue 34
  • a heat medium chamber 74 which circumvents the heat exchange pipes 72 through a heat medium such as water.
  • the tank 44 is divided by a pair of horizontal partition plates 76 and 78 in the vicinity of its top and bottom portions, defining an upper pooling chamber 70a on the upper side of the upper partition plate 76 and a lower pooling chamber 70b between the lower partition plate 78 and the bottom wall 80 of the tank.
  • a heat medium chamber 74 with a predetermined space is defined between the upper and lower partition plates 76 and 78.
  • the upper pooling chamber 70a (with an open top) and the lower pooling chamber 70b are communicated with each other by a number of vertically disposed heat exchange pipes 72 as shown in Fig. 3, the heat exchange pipes 72 being inserted in the heat medium chamber 74 and constantly held in contact with the heat medium (e.g., heated water).
  • the heat exchange pipes 72 are copper pipes with fins 82 at suitable intervals on the outer peripheries thereof.
  • One end of a steam feed pipe 84 which is connected to a steam source, not shown, at the other end is opened into the heat medium chamber 74 substantially at the center of its bottom portion, forcibly blowing saturated steam into the heat medium to raise its temperature to a range of, for example, 48°C to 52°C.
  • the center of the top wall of the heat medium chamber 74 is opened to the air to release gaseous components of the blown-in steam.
  • a support member 88 is bridged between upright posts 86 which support the load of the tank 44, and a motor 90 which is mounted on the support member 88 is connected to an agitator 92. This agitator 92 is inserted into the heat medium chamber 74 through the afore-mentioned top opening to stir the heat medium uniformly.
  • the upper pooling chamber 70a is divided into two sections A and B by upright partition walls 94 which are connected by reinforcing members 102.
  • a horizontally extending diffuser plate 96 is fixedly mounted on the upright wall 94 in section A.
  • Disposed over the diffuser plate 96 are the open ends of the glue feed pipe 68 from the inner tank 58 and the glue return pipe 48 from the glue pan 32. Namely, the starch glue from the subtank 52 and glue pan 32 is poured into the section A, and uniformly distributed over the section A by the diffuser plate 96.
  • a rotary pump 100 with an impeller 98 is provided at the bottom of the lower pooling chamber 70b as shown in Fig. 3 to circulate the starch glue in the pooling chamber 70a, heat- exchange pipes 72 and lower pooling chamber 70b forcibly and positively. Namely, upon driving the rotary pump 100, the starch glue 34 supplied to the section A of the upper pooling chamber 70a is urged into the lower pooling chamber 70b through the heat exchange pipes 72 on the right side in the drawing, and then caused to climb*up through the heat exchange pipes 72 on the right side to enter the section B of the upper pooling chamber 70a.
  • the starch glue While being passed through the heat exchange pipes 72, the starch glue is heated by the heat medium to a temperature of, for instance, 47°C to 49°C, and part of the glue is sent to the pipe 46 leading to the glue pan 32, through an overflow pipe 104 and 3-way valve 106.
  • the glue pan 32 is provided with a glue return pipe 48 as described hereinbefore to circulate the glue to the section A of the upper pooling chamber 70a of the heater 44.
  • These three preheaters 14, 16 and 22 of the preheating mechanism are in the form of drum-like rollers which are heated to a predetermined temperature by internally flowing hot steam, and are respectively journalled at the opposite ends in parallel fashion for rotaion in synchronism with each other. Accordingly, waste heat of high temperature is released around the preheaters during operation of the corrugator machine.
  • Auxiliary heater rolls 110 and 112 are rotatably supported in positions downstream of the preheaters 14 and 16, respectively, and glue applicators 18 and 20 are located downstream of the auxiliary heater rolls.
  • Rotatably supported in a position downstream of the preheater 22 is another auxiliary heater roll 114 which is held in contact with the moving liner 24 for heating same to a temperature suitable for adhesion to ridge portions of the corrugated core sheet.
  • the above-mentioned glue applicators 18 and 20 are arranged in the same manner, and each includes a glue pan 32 for holding starch glue 34 to a predetermined level, an applicator roll 38 for transferring the starch in the glue pan to ridge portions of a single-faced corrugated board, and a doctor roll 30 for controlling the thickness of the starch glue transferred onto the applicator roll.
  • a guide roll 116 for guiding the single-faced corrugated board and liner is located downstream of each one of the auxiliary heater rolls (which constitute part of the preheating mechanism).
  • Located over the applicator roll 28 is a rider roll 118 which presses the back liner of the single-faced corrugated board at a position spaced from the applicator roll 28 by a predetermined distance for smooth transfer of the starch glue onto the ridge portions of the corrugated core sheet.
  • the preheaters and auxiliary heating rolls which constitute the preheating mechanism and the glue applicator mechanism are enclosed in a substantially sealed heat insulating chamber 120 which is provided'in the casing 42.
  • This casing 42 is, for example, a box formed of metallic sheets and lined with a heat insulating material such as glass wool.
  • slit-like openings 122 are formed at suitable positions of the side wall of the casing 42 for passing the single-faced corrugated board 10 and 12 and the liner 24.
  • FIGs. 5 and 6 there is shown another embodiment of the invention, the essential parts of which is common with the embodiment of Figs. 2 to 4 and which is directed to the same purpose.
  • Fig. 5 differs in that a steam blowing means is provided at a position upstream of the guide rolls 26 as illustrated in Fig. 6 for further accelerating heat-up of the starch glue applied on the ridge portions of the corrugated core sheet.
  • the steam blowing means consists of steam blow pipes 124 which are located immediately upstream of the guide rolls 26 between which the single-faced corrugated board 10 and 12 are bonded to each other and to the liner 24, to accelerate heating of the starch glue on the ridge portions of the respective corrugated board.
  • each steam blow pipe 124 is provided with a row of steam blow holes 126 along the length thereof, which are directed toward the ridge portions of the corrugated board. Hot saturated steam which is blown out under pressure from the steam blow holes 126 is blasted against the starch glue on the ridge portions of the fluted core sheet, quickly elevating the temperature of the glue so that it will reach the gelation temperature in a shortened time period in the succeeding heating zone.
  • the glue heater with the above-described construction according to the invention operates in the manner as follows. As shown particularly in Fig. 2, the starch glue 34 which is stored in the stock tank 50 is once pooled in the inner tank 58 of the subtank 52 in the particular embodiments shown, and warmed up to a temperature of 38°C to 40°C by heated water or other heat medium in the outer tank 60 priur to supply to the section A of the upper pooling chamber 70a of the glue heater 44 through the pipe 68.
  • the heat medium for example, heated water which is filled around the heat exchange pipes 72 in the heat medium chamber 74 is heated up to a temperature of 48°C to 52°C by saturated steam which is forcibly blown into the heat medium through the steam feed pipe 84.
  • the starch glue 34 which is held in the section A of the upper pooling chamber 70a is circulated into the lower pooling chamber 70b through the heat exchange pipes 72 and then to the section B of the upper pooling chamber 70a through other heat exchange pipes 72 by operation of the pump 100.
  • the starch glue 34 is heated to a temperature of about 47°C to 49°C (a temperature immediately before gelation of the starch glue) by heat exchange, and part of the heated glue is sent to the pipe 46 through the overflow pipe 104 by the glue feed pump 108 for supply to the glue pan 32 of the glue applicator.
  • the starch glue 34 which is supplied to the glue pan 32 of the glue applicator in this manner is heated during passage through the heater 44 to a temperature range which is approximately 10°C lower than its gelling temperature, for example, to a temperature range of 47°C to 49°C. Accordingly, when the glue is applied to the ridge portions of the respective single-faced corrugated board by the applicator rolls 28, it is already heated up to a relatively high temperature. It follows that after bonding together the single-faced corrugated board and a back liner (liner 24) through the guide rolls 26, slight heating suffices to heat up the starch glue to its gelling temperature to produce its adhesive force.
  • the corrugated board glueing machine employs a plural number of heat sources including preheaters 14, 16 and 22 and auxiliary heating rollings 110 to 114 (which are maintained at a predetermined temperature by internally flowing hot saturated steam) within a closed space of the heat insulating chamber which is defined in the casing 42, so that the temperature in the heat insulating chamber is maintained at a high level during operation of the glue applicator by the waste heat of high temperature released from the above-mentioned heat sources. Therefore, the starch glue which is held in the glue pan 32 after heat-up through the glue heater 44 is maintained in the heated state in the hot atmosphere of the heat insulated chamber.
  • heat sources including preheaters 14, 16 and 22 and auxiliary heating rollings 110 to 114 (which are maintained at a predetermined temperature by internally flowing hot saturated steam) within a closed space of the heat insulating chamber which is defined in the casing 42, so that the temperature in the heat insulating chamber is maintained at a high level during operation of the glue applicator by the waste heat of high temperature released
  • the time for heating the starch glue up to the gelation temperature can be further shortened.
  • the temperature of the starch glue which is applied on the ridge portions of the corrugated core sheets in preheated state can be raised quickly by blowing thereagainst hot saturated steam from the steam pipes 124 immediately before bonding the corrugated sheets and liner together (while preventing the temperature of the starch glue from dropping by contact with cold air which would otherwise take place unless shielded by the heat insulating chamber).
  • the single-faced corrugated board 10 and 12 and liner 24 are bonded together between the guide rolls 26.
  • the present invention makes it possible to shorten the length of the heating zone constituted by heat boxes 36 which is located downstream of a sheet bonding station when bonding double-faced dual corrugated board as shown in Figs. 2 and 5.
  • the time for heating the starch glue up to its gelation temperature can be shortened to a considerable degree, permitting to bond the sheets more quickly and to speed up the operation of the corrugator matchine as a whole thereby to improve the efficiency of the corrugated board production all the more.
  • the sheet preheating and glueing mechanisms are shielded in a heat-insulated space in a casing, the temperature of the starch glue from the glue heater 44 can be maintained in heated state, by effective use of radiant heat from the preheating mechanism, which has thus far been wasted away. Needless to say, this greatly contributes to economical use of energy.
  • corrugated board glueing machine can also be applied to the production of corrugated board by a single facer as mentioned hereinbefore.
  • mechanical operating parts of the single facer or glue machine may be totally covered by the heat-insulating casing to shield off operational noises or scattering paper dust for improvement of the working environment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Claims (5)

1. Verfahren zum Verleimen von Wellpappe mit Auftragen eines Stärkeleims (34) auf Rippenteile eines vorgewärmten, gewellten Innenblatts und Verbinden des Innenblatts mit einer Decklage zum Bilden der Wellpappe; gekennzeichnet durch Erwärmen eines Stärkeleims (34) auf einen vorbestimmten Temperaturbereich durch Wärmeaustausch (44); Zuführen des besagten Stärkeleims zu einem zum Erhalten des besagten Stärkeleims im erwärmten Zustand in eine heisse Atmosphäre eines wärmeisolierten Raums (42) plazierten Leimtiegel (32); Einspeisen des besagten gewellten Innenblatts und einer Decklage in den besagten wärmeisolierten Raum (42); und Auftragen des erwärmten Stärkeleims (34) auf Rippenteile des besagten gewellten Innenblatts in Vorbereitung des Verbindens des besagten gewellten Innenblatts und der Decklage miteinander.
2. Verfahren nach Anspruch 1 mit dem Schritt des schnellen Erwärmens des Stärkeleims (34) auf den Rippenteilen des besagten gewellten Innenblatts durch Dagegenblasen von heissem Dampf (126) direkt vor dem Verbinden des besagten gewellten Innenblatts und der Decklage miteinander.
3. Vorrichtung zum Verleimen von Wellpappe mit einer Vorwärmeeinrichtung (14, 16) zum Vorwärmen eines miteinander zu verbindenden gewellten Innenblatts und einer Decklage, und einer Leimauftragevorrichtung (18) zum Auftragen von Stärkeleim in einem Leimtiegel (32) auf Rippenteile des vorgewärmten gewellten Innenblatts mittels einer Auftragewalze (28), wobei die besagte Einrichtung gekennzeichnet ist, durch:
ein mit dem besagten Leimtiegel (32) in Verbindung stehenden und zum Aufwärmen von Stärkeleim (34) aus einem Vorratsbehälter (50) auf einen vorbestimmten Temperaturbereich geeigneten Leimheizgerät (44); und
ein einen im wesentlich geschlossenen Wärmeschutzraum (120) um besagte Vorwärmeeinrichtung und Leimauftragevorrichtung bildendes Gehäuse (42).
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das besagte Leimheizgerät (44) eine Sammelkammer (70a) zum vorübergehenden Speichern von aus besagtem Vorratsbehälter (50) zugeführten Stärkeleim umfasst, eine Mehrzahl von mit der besagten Sammelkammer in Verbindung stehenden und den Durchlauf von dem besagten Stärkeleim durch dieselbe gestattenden Wärmetauschrohren (72), eine ein in Berührung mit den besagten Wärmetauschrohren stehendes Wärmemittel enthaltende Wärmemittelkammer (74), und ein in die besagte Wärmemittelkammer mündendes Dampfblasrohr (84) zum Einblasen von gesättigtem Dampf in dieselbe.
5. Vorrichtung nach Anspruch 3 oder Anspruch 4, weiterhin gekennzeichnet durch ein unmittelbar oberhalb einer Stelle, wo das besagte gewellte Innenblatt und die Decklage miteinander verbunden sind befindliches Sattdampfblasrohr (124), mit einer Mehrzahl von jeweils auf Rippenteile des besagten gewellten Innenblatts gerichteten Dampfblaslöchern (126).
EP85301095A 1984-02-20 1985-02-19 Verfahren und Vorrichtung zum Kleben von Wellpappe Expired - Lifetime EP0155766B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59030899A JPS60203430A (ja) 1984-02-20 1984-02-20 段ボ−ルシ−ト貼合わせ方法および装置
JP30899/84 1984-02-20

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EP0155766A1 EP0155766A1 (de) 1985-09-25
EP0155766B1 true EP0155766B1 (de) 1987-09-30
EP0155766B2 EP0155766B2 (de) 1991-04-10

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EP (1) EP0155766B2 (de)
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Also Published As

Publication number Publication date
DE3560698D1 (en) 1987-11-05
JPS60203430A (ja) 1985-10-15
JPH0510220B2 (de) 1993-02-09
EP0155766A1 (de) 1985-09-25
EP0155766B2 (de) 1991-04-10
US4655870A (en) 1987-04-07

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